Type-writing machine.



E. M.. v. MARGHTHAL.

} TYPE WRITING MAGHINB. APPLICATION FILED mums, 1912.

Patepted Feb. 4, 1913.

UNITED srArEs PATENT UFFIGE.

EDUARD MAREK v. MARCHTHAL, OF VIENNA, AUSTRIA-HUNGARY, ASSIG-NOR TO SIE-MENS & HALSKE, A. G., OEBERLIN, GERMANY, A CORPORATION OF GERMANY.

TYPE-WRITING- MACHINE.

Specification of Letters Patent.

Patented Feb. 4, 1913.

To all whom it may concern:

Be it known that I, EDUARD MAREK v. MARCHTHAL, a citizen of the Empireof Austria-Hu'ngary, and residing at Vienna, Austria-Hungary, haveinvented certain new and useful Improvements in Type-Writing Machines,of which the followingis a specification.

In type printing machines, in which the types are arranged on theperiphery of a plurality of type disks, it becomes necessary to axiallyshift the type wheel which com- I prises these disks, in order to bringone or the other desired type disk into alinement with the printinghammer to print the .desired type onto the strip which passes betweenthe hammer and the type wheel.

invent-ion relates to such axial adjustment of type wheels in machinesof thecharacter described, and theparticular features ofsuch adjustmentare that the wheel, which tends under the action of suitable means, toaxially assume a normal end position, is held by a stop in the adjustedposition, and that as soon as it is to be adjusted into a new positionthis stop is completely released, so that the wheel first moves into itsnormal end position before the operating mechanism conveys it into thenew position.

In the accompanying drawings I have illustrated my invention and inthese drawings Figure 1 is a side elevation of the wheel shiftingmechanism. Fig. 2'is an end viewof one of the cam cylinders. Fig. 3 isafront elevation of the clutch mechanism.

Referring to F igl of the drawings 1 represents the type wheel which mayconsist ,of any number of type disks, integral with it, wh ich canyontheir periphery the types used for printing. In the present case I haveshown three type disks 1*, 1 1 on In the machine of which theillustrated mechanism forms a; part the type wheel iswheel 1 but thetypes on their periphery are ';not illustrated. Wheel 1 is keyed toshaft 4 which is. driven by the gear wheel 5 from me shaft rotatingmechanism (not shown).

intended to normally rotate and to be stoppedfrom rotation predeterminedpositions only when the desired type is in front of the printing device,so as to permit the latter to operate. To permit freedom ofaxial'movement of the wheel irrespectively of its rot'ative mot-ionwheel 5 is splined on shaft 4 as shown at 5. The printing device ismerely diagrammatically illustrated by the hammer 3 to show its locationand it operates by striking at the proper moment against paper strip 2which is thereby pressed against the desired type of the disk which isshifted into alinement with the hammer by the mechanism which forms thesubject matter of the present invention.

On shaft 4 is disposed a-s ring 7 which bears at one end against the xedabutment 6 and at its other end against a collar 8 fixed on shaft 4 sothatthe shaft normally tends to move downward. The lower end of shaft 4bears against a stop plate 10 carried by a lever 9 pivoted .at 11. Aspring 12 tendsto press this lever against the stop 13 in its lowestposition I shown in dotted 16 in the positions II and III through'detent or nose 15, provided on lever 9. This lever 16 can. rock aboutthe axle 17 and carries an antifrict-ion roller 18 pressed by the spring19 against a cam 20. This cam is free to rotate on a timing shaft 24but.

can be coupled with it by the clutch 22.

As shown .in Fig: 3 this clutch consists of a grooved collar 22* splinedat 24 to shaft 24,

and axially movable by means of a fork lever 25, whose pins 22' engagein the groove of the collar. Lever 25' is pivoted at 26 and carries atits free end the armature 23' of an electro-magn'et 23 so that when thelatter is energized and its armature attracted, collar 22. is shifted tothe right. A spring 25' normally holds armature 23' in off position.Collar 22 carries at its end facing cam disk 20 a. jaw 22 whichcooperates with a cor respondingly shaped jaw 20' on disk 20 'so thatwhen collar 22 is shifted to the right both jaws engage and thus coupledisk 20 to shaft 24.

The cam 20 has a groove 21 in which and 35 nose 14, however, only aslong as it bears againstthe stop 32.; Its other arm has a nose 34 whichcoacts with two stops 35' the stop 35, as shown in full lines in thedrawing, or on the stop 35 or, as shown in dotted lines org neither ofthem. In the I latter instancethe end 33 of the vertical arm of thelever and the nose 14 remain in contact during the entire downwardmovement of the slide 28, and the lever 9 is rocked so that its stop 15is'enga' 165. with lever 9 'lIl'IJOSllZlOIl III. When the nose 34 isengaged by the stop 35 the shaft 4 .of the type-wheel is lifted only toged. by the tooth the second pOSItIOII' II, while when the nose 34 isheld by the stop 35 the bell. crank 30 is rocked before the nose 15 hasreached 30 the tooth 16' so that the shaft 4 of the type-wheel descendsinto its lowest position I. The lever 35 rocks about an axle 36 and ispivoted at37 to one end of a slide 38. This is pulled by a spring 40 sothat the antifrictionroller 39 journaled'at its other end is pressedagainst a cam 41. This cam 1 is keyed to shaft 4, as shown in Fig. 2.

'When the shaft 4 is arrested so. that the roller 39 is located at oneof the points, I, II or .III inFig. 2, which correspond with thepositions I, II, III of shaft 4, the magnet 23 is energized by'means notshown'here so that disk 20 is coupled to shaft 24 and this shaft is thenrevolved one revolution by means notshown here.- When timing shaft 24rotates thecam 20 is driven by the clutch 22,.the roller 18 runs on to aprojecting part 42 ofits periphery, and the stop 15 of the lever 9 isreleased owing to the bell-crank lever, 16 being rocked. The shaft 4 ofthe type-wheel is then driven by its spring? into the lowest position I.As soon as the roller 18 has left the raised part 42 .of the cam 20 thepart I of the groove 21 has arrived at'the pin 27 and the downwardmovement of theslide 28 begins.

' According to the rotary osition of the shaft 4, the part I, II or IIof the cam 4'1 'is under the roller 39 "and, accordingly, during thedownward movement the nose 34 of the lever 30 abuts against the stop ormoves freely past both of the same, and the shaft of the type-wheel iselevated into its highest position III, or into its middle ofa -lever35. .This lever can be rocked so'ithat the nose v34 bears either on movethe sha the type wheel stops in the proper position the desired type ispresented in frontof the printing hammer.

1-. 'In a machine of the character described, the combination with anaxially movable shaft and a type wheel having parallel rows ofcharacters fixed on its peripher and a printing device opposite thetypew eel, of a stop, aspring tending to move the shaft against thestop, means for arrest-ing the stop in predetermined positions, a timingshaft, and a cam disposed on the timing shaft and adapted to actuatesaid means and thereby release the stop.-

2. In a machine of the character described, the combination with anaxially movable shaft and a type-wheel having parallel rows ofcharacters fixed on its periphcry, and a printing device opposite thetypewheel, of a sto lever, a spring tending to against said stop. lever,means for arresting said lever in predetermined positions to axiallyplace said-shaft int-o correspondingly predetermined posi-. tions, atiming shaft, and acam disposed on the timing shaft and adapted toactuate said means and thereby release the stop lever; said timing shaftcam having a cam groove, a slide having a pin engaging in said groove,3, bell crank lever mounted on the slide and adapted to throw said stoplever out of its normal position with one arm, a spring tending tomaintain said bell crank in engagementv with the stop lever, and anadjustable stop adapted to engage withrtheother' arm of said bell crankto thereby disengage its first arm from said stop lever. 7 I I 3. In amachine of .the character described, the combination with an axiallymovable shaft and a type wheel having parallel rows of characters fixedon its peripher and a printing device opposite the type w eel of astoplever, a spring tending to move the shaft against said lever, alockingbell crank for arresting said lever in predetermined positions toaxially place said shaft finto correspondingly predetermined positions,a timing shaft and a cam disposed on the timing shaft and in o ment withsaid locking bel crank -to release the stop lever, said timing shaft camalso having a cam groove, a slide'having a pin in engagement with saidgroove, a releasing bell crank mounted on said slide and adapted to.throw saidstop leverout of its erative engagenormal position with onearm, a spring tending to maintain said releasing bell crank in operativeengagement with said stop lc- V8i,- and an adjli stable stop adapted t6en 7 ame to this specification in' the presence of age with the otherarm of said releasing two witnesms.

rank to thereby disengage its first arm a from said step lever, and acam' fast'on EDUARD MARE]; MARCHTHAL' '5 said axially movable shaftforadjusting the Witnesses:

said adjustable stop. AUG ST FUGGER,

In testimony whereof I have signed my ADA MARIA BERGER.

e Copiesot this patent may be obtained for five cents each, byaddressing the Gommissioner of Patents, Weshingten, D. G.

